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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 10 |
| 4 | 35 |
| 5 | 231 |
| 6 | 3003 |
| 7 | 14586 |
| 8 | 138567 |
| 9 | 5311735 |
| 10 | 154040315 |
| 11 | 434113615 |
| 12 | 16062203755 |
| 13 | 354604036745 |
| 14 | 15247973580035 |
| 15 | 286661903304658 |
| 16 | 7596540437573437 |
| 17 | 79093391614735197 |
| 18 | 4824696888498847017 |
| 19 | 85067024086690197405 |
| 20 | 6039758710155004015755 |
| 21 | 230948868774022296411965 |
[2,3,10,35,231,3003,14586,138567,5311735, 154040315,434113615,16062203755,354604036745, 15247973580035,286661903304658,7596540437573437, 79093391614735197,4824696888498847017, 85067024086690197405,6039758710155004015755, 230948868774022296411965] |